how to open the aio threads in apisix

[Lionelpang]

how to config the apisix open the aio threads for the nginx。

[tokers]

With the help of main_configuration_snippet field in config.yaml, you can enable any Nginx directive. But you may have to re-compile the openresty and enable the file aio (--with-file-aio) by yourself, you may check out http://apisix.apache.org/docs/apisix/how-to-build/#step-6-build-openresty-for-apache-apisix to learn how to build your own OpenResty for APISIX.